Improvement in gang-plow cultivators



UNITED STATES PATENT OFFICE.

HENRY P. MCCLEAVE, OF TOIVIALES, CALIFORNIA..

IMPROVEMENT IN GANG-PLOW CULTIVATORS.

Specilication forming part of Letters Patent No. 96,334, dated November 2, 1869i.

To all w/wm it may concern..-

Be it known that I, HENRY P. McCLEAvE, of Tomales, in the county of Marin and State of California, have invented certain new and useful Improvements in Gang-Plow Cultivators; and I do hereby declare that the following is a full and eXact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of my invention is to provide a gang-plow and cultivator combined, having a great cutting-width, and of light draft, and admirably adapted to summer fallowing. At the same time the shares or teeth are of that peculiar construction that they are self-sharpening, and maybe easily removed from time to time.

In the drawings, Figure l represents a side elevation of .my machine. Fig. 2 is a plan. Fig. 3 is asection of standard and blade. Fig. 4, in red, shows a development of blade.

To enable others skilled in the art to which it most nearly appertains to make and use my invention, I will proceed to describe fully its construction and operation.

The principal objects in view, in the construction of my frame A, are to combine strength with lightness and durability, and consequently the shapeis oblong,withthe end of one :rail proj ectingaat the rear,to attach the last series of the gang. The front and rear portions of the frame are provided with parallel braces B B B, resting in the mortised beds by the cross-beams B B. The draftpole C is connected to the machine by a rod, D, one end of which passes through the frame, and is provided with a screw and tap, E, the opposite end having a hook, F, which enters an eye strapped to the end of the pole. The pole rests on the top of the frame in straps or band with the usual accompaniment of turning to or from land. The frame is mounted on two driving-wheels, provided with a double-crank axle, G, to one of which is attached a lever, H, operating in a rack, I, at the side of the drivers boX. On the top of the frame is bolted a flat strap, J, which is placed diagonally. The standards K K, which carry the blades or shares, pass through the strap,where they are held by nuts and screws. Brace-rods L L extend from the standards to the frame, in the same diagonal manner, so as to receive the force or strain at the points at which it is most liable to take place. The construction and bracing of the whole frame and its attachments are such as to resist the strain incident to the manner of atL taching so large a gang of cutting-instruments, and yet remain intact.

The diagram in red shows the developi ment of the blades M, which is described by two parallel straight lines,a' x, tangent, respectively,to the two arcs of circlesg/y, struck from centers, as shown, and bent in a peculiar manner, so as to form two cutting-edges, N N, and are attached to the standards by two retaining-bolts, o o, and by removing which and reversing the blade either end can be brought into working position at the same angle or curvature.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

The frame A, constructed substantially in the manner described, with parallel braces B B B, diagonal strap J, through which the ends of the standards pass, and the draft-rod D, attached to the rear cross-beam,B,as specified, for the purpose set forth.

In witness whereof I have hereunto set my hand and seal.

HENRY I. MCCLEAVE. [L s] Witnesses:

C. V. M. SMITH, MMEAGHEE. 

